registry / Data exfiltration / nemo-jaws

nemo-jaws

Dependency confusion proof of concept package

This report shows the evidence for nemo-jaws@28.0.0. 4 of 4 known versions are blocked or flagged. See all versions.

This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 3mo ago · by lpm-firewall-ai

Source directly confirms unconsented install-time collection and exfiltration of host-identifying data. This is concrete malicious behavior, not a benign package-aligned network action.

Static reason

One or more suspicious static signals were detected.; source fingerprint signature matched known malicious package; routed for review

Trigger

npm preinstall during package installation

Impact

Unconsented disclosure of machine identity, home-directory path, and DNS configuration.

Mechanism

install-time host fingerprinting and external POST exfiltration

Attack narrative

Installing the package triggers its preinstall hook, which runs index.js without user action. The script collects local host metadata and DNS resolver configuration, serializes it, and POSTs it to an external oastify.com endpoint.

AI rationale

Source directly confirms unconsented install-time collection and exfiltration of host-identifying data. This is concrete malicious behavior, not a benign package-aligned network action.

Evidence

package.jsonindex.jsnemo-jaws-28.0.0.tgz

Network endpoints1

iaw5sqvrkqmghau6kwlwtalpqgw8k88x.oastify.com/hit

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

package.json runs `node index.js` in preinstall.
index.js collects hostname, platform, architecture, home directory, and DNS servers.
index.js POSTs collected host data to iaw5sqvrkqmghau6kwlwtalpqgw8k88x.oastify.com/hit.
The nested tarball contains the same lifecycle script and collector.

Evidence against

Behavioral surface

Source

Network

Supply chainNo supply-chain packaging signals triggered.

Manifest

NoLicense

scanned 1 file(s), 563 B of source

Source & flagged code

5 flagged

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

index.jsView file

1const https = require("https"); L2: const os = require("os"); L3: const dns = require("dns"); L4: L5: const data = JSON.stringify({ L6: hostname: os.hostname(), L7: platform: os.platform(), ... L26: L27: req.write(data); L28: req.end();

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

index.jsView on unpkg · L1

•matchType = malicious_source_fingerprint_signature signature = 55ef5c661ef1e2d6 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = preferenceslifecycle-paypal@28.0.0 matchedPath = index.js matchedIdentity = npm:[redacted]:28.0.0 similarity = 1.000 shingleOverlap = 1 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

index.jsView on unpkg

nemo-jaws-28.0.0.tgzView file

•path = nemo-jaws-28.0.0.tgz kind = compressed_blob sizeBytes = 1196 magicHex = [redacted]

Medium

Ships Compressed Blob

Package ships compressed or archive-like blobs.

nemo-jaws-28.0.0.tgzView on unpkg

•path = nemo-jaws-28.0.0.tgz kind = nested_archive_needs_inspection sizeBytes = 1196 magicHex = [redacted]

Low

Nested Archive Needs Inspection

Package ships a nested archive or MCP bundle that was inventoried but not recursively analyzed.

nemo-jaws-28.0.0.tgzView on unpkg

Source & flagged code

5 flagged · loading source

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

index.jsView file

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

index.jsView on unpkg · L1

High

Known Malware Source Fingerprint Signature

Findings

3 High2 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighHost Fingerprint Exfiltrationindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

MediumNetwork

MediumShips Compressed Blobnemo-jaws-28.0.0.tgz

LowScripts Present

LowNested Archive Needs Inspectionnemo-jaws-28.0.0.tgz

LowNo License

Affected versions and remediation

This report applies to nemo-jaws@28.0.0.

The versions list below shows the verdict for each recorded version.

Avoid installing nemo-jaws@28.0.0. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-09-24 09:00:54.957Z (UTC).

Source advisory published: 2026-04-16 10:07:12.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

4 known versions

28.0.0latestshownMaliciousData ExfiltrationBlockPublishedJul 25, 2026, 9:19 AM 25.0.0MaliciousMalwareBlockPublishedJul 23, 2026, 8:59 PM 99.99.9MaliciousMalwareBlockPublishedMar 13, 2026, 12:37 AM 3.99.99MaliciousMalwareBlockPublishedMar 11, 2026, 9:01 PM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

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Source & flagged code

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